Answer:
B
Step-by-step explanation:
sum means addition so n plus 9 would give you the sum of the both
Answer:
C. 
Step-by-step explanation:
c
20.7123152 thats the answer i looked it up
As y varies directly with x, there is a proportionality constant. As x increases by that certain constant, y also increases. We equate:
y = kx
where k = proportionality constant.
Given the condition, y = 5 when x = 4, then we solve for k:
5 = k(4)
k = 5/4 or 1.25
When y = 8, then
8 = (5/4)(x)
x = 8/(5/4) = (8)(4/5) = 32/5 or 6.4 (ANSWER)
